C16B3 NSX160B frame: trip-unit and protection coordination

For maintenance and procurement teams, C16B3 identifies a specific ComPacT NSX breaker frame. Keep the full C16B3 designation on the inquiry and compare it with the installed label. The published collage is illustrative for the category, not a code-specific photograph.

Core specification table

What to confirm on the installed unit

The C16B3 reference identifies a breaker frame, not a fully specified protective assembly. Choose and verify the trip unit separately against the circuit design.

For C16B3, compare the exact nameplate, wiring diagram and manufacturer literature before allowing a substitution. A close-looking suffix can change ratings, interface or delivered components.

Before energizing or commissioning

Review prospective fault level, conductor sizing, accessories and mechanical installation. On replacement, document trip settings and perform the required protection and operational tests.

Document the existing C16B3 circuit, accessories and setpoints before removing hardware. Use the site's isolation and commissioning procedures, and preserve the approved engineering record.

Application fit

The C16B3 reference identifies a breaker frame, not a fully specified protective assembly. Choose and verify the trip unit separately against the circuit design.

The final choice of C16B3 depends on the actual installation. Check ambient conditions, available space, mating parts and local electrical requirements rather than inferring fit from appearance.

On-site replacement notes

Review prospective fault level, conductor sizing, accessories and mechanical installation. On replacement, document trip settings and perform the required protection and operational tests.

After fitting C16B3, verify the intended function under representative operating conditions and record the result. A matching code does not eliminate the need for a functional check.

Nearby model designations

The following 12 references resemble C16B3 in their designation. They are grouped here for inquiry and comparison, not claimed to be electrically interchangeable with C16B3. Check each complete suffix, rating and connection before ordering.

C16B4, C16F3, C16H3, C16N3, C16B3TM125, C16B3TM160, C16B3TM160C, C16F4, C16H4, C16N4, C1632D160, C1632G160

Order-review summary

When requesting C16B3, include the exact C16B3 label, site voltage, connected equipment, installation photo and required quantity. State whether original C16B3 stock or a documented engineering alternative is acceptable. Ask the supplier to confirm current availability, accessories and manufacturer documentation.

Before releasing C16B3 to site, compare the delivered full code and terminal/connector arrangement with the approved bill of materials. Keep C16B3 associated with its original application and obtain qualified review if any rating, function or lifecycle status differs.